refactor(forms): Update computed properties to live in AbstractContro… #56545
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…lStatus
The
computed
properties are not "safe" to share around broadly because form status, value, etc. is not stable during change detection. If these were shared more broadly, recomputation happens when the value is requested at these different read locations. This can result in the value flipping back and forth before settling on its final state, which may actually be the same as it was at the start of change detection. The host bindings rely on being able to check the computed equality against what it was on its own last read.